1/4 a^{a1,a2}_{c0,a0} b^{c0,v2}_{v0,v1} c^{a3}_{v2} a+(a0) a+(v0) a+(v1) a-(a3) a-(a2) a-(a1)
+1/4 a^{a0,a1}_{c0,a2} b^{c0,v2}_{v0,v1} c^{a3}_{v2} gamma1^{a2}_{a3} a+(v0) a+(v1) a-(a1) a-(a0)
-1/4 a^{a0,a1}_{c0,a2} b^{c0,v2}_{v0,v1} c^{a3}_{v3} gamma1^{a2}_{a3} a+(v0) a+(v1) a+(v3) a-(v2) a-(a1) a-(a0)
+1/4 a^{a0,a1}_{c0,a2} b^{c1,v2}_{v0,v1} c^{a3}_{v2} gamma1^{a2}_{a3} a+(c0) a+(v0) a+(v1) a-(a1) a-(a0) a-(c1)